RiverBasinObject: Structures

Structures are describing man-made construction that
affect the flow of the river such as weirs and regulators,
but excluding dams that have a large storage volume in comparison,
and are treated separately and explicitly as dams/reservoirs
together with natural lakes.

They are primarily described by their HEADER and the
hypertext description and imagery.

Attributes are grouped into topics and shown in pop-up windows
that are triggered by BUTTONS.
They include:

Admin owner, and permit/licensing information;

Construction basic design parameters;

Links to other objects:
please note that all wells should be linked to an
aquifer object at least.